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| PartNumber | EF-21933-000 | EF-21935-000 | EF-21763-000 |
| Description | Speakers & Transducers 7.87 X 5.59 X 4.01MM 125 SENS, 12S PORT | Speakers & Transducers 7.87 X 5.59 X 4.01MM 125 SENS, 12S PORT | Speakers & Transducers 7.87 X 5.59 X 4.01MM 125 SENS, 12S PORT |
| Manufacturer | Knowles | Knowles | - |
| Product Category | Speakers & Transducers | Speakers & Transducers | - |
| RoHS | Y | Y | - |
| Product | Receivers | - | - |
| Frequency | 6.3 kHz | - | - |
| Sound Pressure Level | 126.5 dBA | - | - |
| Impedance | 1.275 kOhms | - | - |
| Termination Style | Solder Pad | - | - |
| Length | 7.87 mm | - | - |
| Width | 5.59 mm | - | - |
| Depth | 4.06 mm | - | - |
| IP Rating | - | - | - |
| Packaging | Bulk | Bulk | - |
| Series | EF/FEF | EF/FEF | - |
| Brand | Knowles | Knowles | - |
| Length in | 0.31 in | - | - |
| Length mm | 7.87 mm | - | - |
| Product Type | Speakers & Transducers | Speakers & Transducers | - |
| Factory Pack Quantity | 25 | 25 | - |
| Subcategory | Audio Devices | Audio Devices | - |
| Width in | 0.22 in | - | - |
| Width mm | 5.59 mm | - | - |